I got your point but let's be real, they are not doing this for free and money can said to be the ultimate goal for this dudes, neither of them is gonna get by feed by their legacy, just look at Ken Shamrock and Bob Sapp.
Instead of saying he have more money Punk can say he is easily way more successful than Cathal which is true, you guys can say all the shit about WWE but not everybody succeed there and punk actually did it.
Obviously they don't do it for free and I also get your point and agree to an extent but I think most people would agree that money is only part of the reason people do stuff (no matter what that "stuff" might be)
like if you said "natman.. i'll give you 2 choices: You can make 100 million a year as a car salesman or I'll give you 1 million dollars a year to write fiction"
believe it or not, i'm taking the latter. Why? Because making very good money doing something you love is way better than making fantastic money doing something you don't want to do
and let me take this one step further, there are other reasons than pure money that people do stuff. It's true that legacies don't pay the bills but they still mean something to a lot of people.
Honor, legacy, living their dreams, those things can be just as important to a person as money.
So if you ask someone like GSP "would you rather get a few million (or whatever decent amount) per fight to try to be the best MMA fighter of all time or would you rather get 10x as much to be a laughing stock like bob sapp that takes dives and everyone makes fun of him?"
I think he'd take the lesser money. Some people would take less money if it meant they could be "the best" some people would take less money if it meant they could be "the champion"
same goes for setting records
The olympics are a great example of this. Most olympic athletes know damn well they're not going to get rich from the olympics (see ronda's story pre-MMA) but they do it anyway, sometimes they even give up money making opportunities to do it.
Why? Because it's they're dream and life is about more than just money
It was the perfect response from CM Punk. Let's be frank, Cathal only mentioned him for exposure/publicity. He wants that CM punk money that he's bringing to the table. It's the ONLY reason to even mention/challenge CM Punk publicly the way he did.
CM Punk understands this and it was him in fact that called "a spade a spade." Cathal wants to pick a fight with an inexperienced pro wrestler because he would make a lot of money from the fight. To get said big payday fight he starts insulting the pro wrestler about his inexperience. And so the pro wrestler, rightfully so, gloats about being richer because he knows that's what Cathal is really after here.
CM Punk even asked him earlier on twitter why he's not challenging a top 10 fighter or something and going after him instead. It's obvious to everyone why: the money.
CM Punk obliterated Cathal in this war of words. The man made a living off of this stuff. Don't let your (supposed) bias against pro wrestling deceive you here.
All that said in a fight Cathal would very, very likely destroy CM Punk.
There is about an 80+% chance that you're right, but there is a small chance that there's more to it than cathal just looking for a big payday.
You automatically say "he's calling CM Punk out FOR MONEY!" (or at least for the fame of it)
But what about the fact that some people want to fight CM Punk just to prove a point? There are some people that take the sport very seriously from both a sport and an art perspective
barn cat recently said just yesterday when he resigned with the UFC that he wanted to get back into the "the sport of MMA" instead of being in the "MMA sports entertainment" business (ie bellator)
call it a "purist"
call it whatever you want but some people take the idea of being a mixed martial artist very seriously and the idea that the UFC is supposed to be the elite of the MMA world, they take that very seriously too.
So you've got a guy like Cathal, who gets into the UFC, and he may never be a champion quality guy but he can say with his head held up high that he is truly a "UFC caliber fighter" cause he made it into the UFC, and that alone is something he can brag about for the rest of his life.
Well someone like CM Punk comes along and cheapens that by whoring his way in with fame.
It makes the thing that Cathal is so proud of seem less important (like someone could say "so what you got into the UFC? So did CM Punk! lol!!!")
obviously only an idiot would actually say that but still... it does put it in the back of people's mind.
The prestige of the UFC has been slightly tainted by CM Punk (as it was in some ways tainted by Brock Lesnar before he proved he could actually fight the champion at the time and win----and even then some people said that just showed how weak ufc fighters are)
and this fact makes people hate CM Punk, it makes the guys who actually earned their way into the UFC (the old fashion way) want to line up to kick his ass.
You say it's about the money only, or the fame. I'd be willing to bet there are a lot of UFC fighters that would be happy to fight CM Punk behind closed doors, for free. Just for the privilege of kicking his ass